\begin{tikzpicture}
    % 根据本节的 “练习” 第 1 题中所给数据进行绘制
    \tkzDefPoints{0/0/B,  3/0/C}
    \tkzDefPoint(60:2){A}
    \tkzInterCC[R](A,2.1)(C,1.3)  \tkzGetFirstPoint{D}

    \tkzDefPointOnLine[pos=-0.4](A,B)  \tkzGetPoint{E}
    \tkzDefPointOnLine[pos= 1.4](A,B)  \tkzGetPoint{F}
    \tkzDefPointOnLine[pos=-0.4](B,C)  \tkzGetPoint{G}
    \tkzDefPointOnLine[pos= 1.4](B,C)  \tkzGetPoint{H}
    \tkzDefPointOnLine[pos=-0.4](C,D)  \tkzGetPoint{K}
    \tkzDefPointOnLine[pos= 1.4](C,D)  \tkzGetPoint{L}
    \tkzDefPointOnLine[pos=-0.4](D,A)  \tkzGetPoint{M}
    \tkzDefPointOnLine[pos= 1.4](D,A)  \tkzGetPoint{N}

    \tkzDrawPolygon(A,B,C,D)
    \tkzDrawSegments[dashed](A,E A,N B,G B,F  C,K C,H  D,M  D,L)
    \tkzLabelPoints[above](E,L)
    \tkzLabelPoints[above,xshift=-.5em](A,B)
    \tkzLabelPoints[above right](C,D)
    \tkzLabelPoints[left](G,N)
    \tkzLabelPoints[right](M,H)
    \tkzLabelPoints[below](F,K)
\end{tikzpicture}

